Matches a sequence of 2 or more uppercase letters not surrounded by parenthesis.

Regular expression for IP v4 string. ^((25[0-5]|2[0-4]\d|1\d{2}|\d{1,2})\.){3}(25[0-5]|2[0-4]\d|1\d{2}|\d{1,2})$

1. Type = xhr Response Headers access-control-allow-headers DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,X-DEVICE-TOKEN,deviceToken,agent access-control-allow-methods access-control-allow-origin...

Rows that could be considered numeric format data in SAS

\w

Validación de patentes de Argentina, del tipo XXX### o XX###XX.

Letters, numbers, space and  . ,  ' - /

Letters, space and - , . ' & / 

Select emails from a string

parse an edgedb DSN string

Do the opposite so we can test for invalid characters

Matches on IPv4 addresses and groups each octet.

Matches on whole IP addresses

Matches on version syntax, grouping the Major version alone, Minor-Patch, and Label alone.

Matches and groups categories of semantic versions.

'^Subject:.\s((=?^.[?=$]).*)'

sure that can be more shortly, but well... and a newbie

get facebook page id from html response

/preg_replace('!\s+!', ' ', $s)/gm

A regex for finding a Bulgarian phone. A Softuni task